Resilient bottom for upholstered chairs, box springs, automobile seats, and couches,etc.



y 1933- J. KRONHEIM 1,918,760

RESILIENT BOTTOM FOR UPHOLSTERED CHAIRS, BOX SPRINGS,

AUTOMOBILE SEATS, AND COUCHES, ETC

Filed Aug. 25, 1930 2 Sheets-Sheet 1 \NVE NTO R Jnbms Knew/15m ml Wm M ATTORNEY INVENTOR 1,918,760 BOX SPRINGS; ETC

2 Sheets-Sheet ATTORNEY y 13, 1933- J. KRONHEIM RESILIENT BOTTOM FOR UPHOLSTERED CHAIRS,

AND COUCHES, 23, 1930 JHC'UB KRUNHE/M m Mm M Patented July 18, 1933 UNITED STATES? r Arsa'r- OFFICE 1 JACOB KRONHEIM, 0F CLEVELAND, OHIO RESI'LIENT BOTTOM FOB UPI-IGLSTERED CHAIRS; BOX SPRINGS, AUTOMQBILE SEATS,

AND COUCHES, ETC. i i

Application filed August 23, 1930i Serial; No, 477,320;

My invention relates to an improvement in resilient bottoms for upholstered chairs, box springs, automobile seats andcouches,

and more particularly a resilient bottom in which a flexible base member of Wovenmaterial is adapted to be suspended within a rectangular chair or couch frame by helical.

tion upon the helical suspension. springs.

Separate Wire frames are also embodied in spaced relation in the flexible base member to promote the attachment of the flexible base member to=the chair or couch frame and i to! provide a firm and stable support for the spiral compression springsclosely adjacent the sides. of the chair or couch frame. The wired border edge of thefiexible-.base-memher is also adapted to rest upon hangers or I brackets fixed to the frame, to. support the load or pressure applied. there-tov from above, and preferably the flexible base member isofan area and size to completely close'the opening in the bottom of the frame.

In the accompanying drawings, Fig. l is a plan ortopview, of a chair or couch frame containing a preferred embodiment of the;

invention uncovered, and Fig. Elisa sectional view, Fig. 3 a bottom view of. the same assembly of parts, and Fig. 4 a perspective view enlarged of a corner portion thereof.

Upholstered furniture, such as chairs and couches, usually comprisea Wooden rectangur lar frame 21w1thin or upon which: a spring structure is built to provide a resilient foundationi for a covering ofupholstering. It has also been a common practice in this art to suspend a flexible bottom or base member 3,

of Woven. material or mesh fabric within; the

' frame by means of short helical: suspensionsprings at, and to mount a group of spiral compression spring-"s55 upon the yielding base member. The springsare also usually tied together and to the frame by a network of cords: 6 to maintain theassembly of parts: underpartial tension and promote upholstering operations and to preserve the shape and appearance of the seat, and the helical springs 4 are disposed horizontally within the frame between the border edge of the flexible bot- Thus the flexibletontSand the border rails of the frame, thereby leaving openborder gapsor spaces within the frame which limit the seating area for the upright springs and necessitate the use of relatively short suspension springs. To obtain, a desired or correct shape of seat theupbolstering or, covering for the spring structure is also preferably extended over the border railsof the frame, especially the front rail, and to foster t-hatendthe-upright springs are often, distorted in tieing operations. to, increase the spread of the top supporting area for the covering, or the helical suspen- S101} springs are'omitted along the front rail to permit the upright springs to be seated more closely adjacent that rail; As an improvement. on former practices I provide a yielding basestructure, Whichwill permit the sired length within and at all four sides of the frame; which will increase the seating area for. theupright compression springs an perinittheupright springs at the border to. be seated stably over thesuspension springs closely adjacent to eachand; all; of the rails so, that the top of the spring structure may properly upholstered Withoutdefiecting or distorting the upright springs laterally in any degree or to an objectionable extent; and Which will permit the open bottomv of the seatframe to be completely closed bya basemember: of woven material of equal or sub, stantially equal area-as the frame opening. I achieve these objects by providing a base member 310 t woventextile material having a seating-area overall of substantially the same size as the interior of rectangular frame 2, and-which base member in: the present in;- stance-includes a wire re-enforcing frame 7 hemmed or sewed in a: reverted fold 8, formed the sheet of goods at a predetermined distancefrom tlieiouter edge 9, which is or may be hemmed also to enclose a. second wire re-g enforcing frame-1,0 having approximately. the; same dimensions asthe interior Walls of the. Wooden frame so that the border-apron or extension 11 of member 3-1nay fit closely against such wallsyandcover andi close fihespaoe be tween the inner wire frame 7 and the siderails of wooden frame 2; The suspension: springs 4 are connected to or booked at one end to the inner wire frame 7 and the reverted fold 8, and attached or hooked at their opposite ends to a projecting lug, eye or car 12 forming part of a hanger, clip, or bracket 14 fixed to wooden frame 2. The apron or extension 11 which forms part of base member 3 overlaps and covers the suspension springs 4 and may rest upon these springs in bridging the space between the wooden frame and the inner wire frame 7, and the outer border hem 9 and wire frame 10 may rest upon the lugs or cars 12 extending inwardly from the hangers or brackets 14:. The main 11 adjacent the rails of wooden frame 2 rest upon wire frame 7, so that the outer row or rows of vertical springs 5 1n the structure are actually supported more firmly or with less movement at their base portions than the upright springs which are seated upon the main or middle area of base member 3. Such anarrangement isdesirable because it facilitates upholstering operations and preserves the shape given tothe upholstering initially. The presence and'use of the flap'or extension 11 also permits the use of a relatively wide border space within the frame 2 so that longer helical springs'may be used than formerly. The overlapping extension 11 also permits the use of suspension springs on all four sides of the seat so that the load stresses may be distributed uniformly to the spring structure and the couch frame.

As shown, base member 3 and its supple-' mentary border flap or extension 11 is made of one sheet of woven material, the corner of the sheet being cut, notched or pleated from the outer edges of the goods to the reverted fold 8 to produce and provide a substantially flat or even supporting surface for the upright springs at such corners and to facilitate the seaming or hemming of the parallel wire frames in said base member; However, base member 3 and its supplemental border portion may be made in several pieces, if desired, and

the member may also be covered by a separate sheet of loosely woven fabric 15 to permit the base coils of the upright compression springs 5 to be interfretted or interlocked therewith.

What I claim, is: I

1. In a chair or couch etc., a frame having brackets with projecting portions, a base member of woven material having a wired border edge extending over and resting directly upon said projecting portions, a wire member secured to said material and arranged in spaced relationship parallel to said border edge, suspension springs connected with said brackets and said wire member, and a setof springs seated vertically upon said base member including said wire memher.

2. In a chair or couch, etc., a frame, brackets fixed to said frame having lugs, suspension springs connected to said lugs, a base member of Woven material connected to said springs, an extension for said base member overlying said springs a rigid border edge on said extension adapted to be supported by said lugs, and a group of springs seated upon said'base member and its extension.

'3. In a chair or couch etc), a main frame, a woven sheet having a wired border edge, a flexible extension for said sheet having a wired border edge to provide a substantially flat supporting surface encircling the border edge of said woven sheet, suspension springs connected with said wired border edge of said woven sheet, means for connecting the suspension springs to the frame and supporting the wired border edgeof said extension, and vertically disposed springs superposed upon said woven sheet and its flexible extension.

LIn a chair or couch etc., an open frame, aflexible supporting member having a wired border edge, a flexible extension for said supporting member a' wired border edge for said extension to provide same with a substantially flat supporting surface, and means to connect said supporting member to said. open frame, said means including a series of suspension springs arranged beneath said extension and said extension being sized to snugly fit within the opening of said frame and to rest with its wired border edge upon said connecting means to permit vertically disposed compression springs to be seated upon the border edge of said supporting member and rest upon the flat supporting surface of said extension.

In a chair or couch etc., a frame, a base member within said frame having a wired border edge spaced a substantial distance from inner walls of said frame, springs for suspending said member within said frame,

attachment means for said springs within said frame having portions extending inwardly in respect to said frame, an extension on said base member for covering the said springs, a wired border edge for said extension for supporting same upon the extending portions of said attachment means, and vertically disposed springs partly seated upon and supported by said base member and partly seated upon and supported by said extensions.

JACOB KRONI-IEIM. 

